Charleston Weather in September

What's the weather like in Charleston (Illinois) in September 2024?

The climate in Charleston during September can be summarized as warm and a little damp.

September is in the fall / autumn in Charleston and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 26°C (78°F), whilst at night 13°C (56°F) is normal.

Charleston weather averages (imperial / metric)
Daytime temperature 25.7°C 78.3°F
Nightly temperature 13.3°C 55.9°F
Average temperature 19.5°C 67.1°F
Daily sunshine 8.7 hrs
Avg rainfall 82 mm 3.2 ins
Rainy days 8 days
Sea temperature 20.8°C 69.4°F
Humidity 73%
Windspeed 13.3kph 8 mph

On average September is the 6th driest month of the year in Charleston with around 82mm 3.2 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.

On the flip side this corresponds to an average of 8.7 hours of sunshine per day.

September temperatures in Charleston

Charleston average temperature in September

September rainfall

Charleston average rain in September

September hourly sunshine

Charleston average rain in September

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Charleston in September 2024.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Charleston weather stats

Charleston weather statistics
Hottest month: July 29.8°C 85.6°F
Driest month: February 53mm 2.1ins
Sunniest month: July 10.9hrs
Coldest month: January 1°C 33.8°F
Wettest month: July 108mm 4.3ins
Map showing location of Charleston (39.49615, -88.17615) Charleston map pin © Google

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